/Engine/Plugins/Runtime/RigVM/Source/RigVM/Public/RigVMCore/RigVMExternalVariable.h
[FArchive](API\Runtime\Core\Serialization\FArchive) & operator<< ( [FArchive](API\Runtime\Core\Serialization\FArchive) & Ar, [FRigVMExternalVariable](API\Plugins\RigVM\RigVMCore\FRigVMExternalVariable) & Variable )